By Sing Li; Jonathan Knudsen
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Additional resources for Beginning J2ME platform: from novice to professional
This makes it easy to upgrade or fix Jargoneer. Network MIDP applications are likely to need a server component. If you’re planning to do much MIDP development, you might like to study up on Java servlets. Packaging Your Application You won’t pass class files directly to a MIDP to deploy an application. Instead, you’ll package them in a Java Archive (JAR) using a packager such as the jar tool that comes with the Java 2 SDK. If you’re using the J2ME Wireless Toolkit, you won’t ever have to perform these steps manually; the toolkit automatically packages your MIDlets when you choose Project ➤ Package ➤ Create Package from the menu.
MicroEdition-Profile: This describes the set of profiles upon which this MIDlet suite can run. 0 applications, this is MIDP-20. 0”. In addition to the required manifest attributes, the following attributes may be defined: • MIDlet-Description: The description of the MIDlet suite goes in this attribute. • MIDlet-Icon: Icons for individual MIDlets are described in the MIDlet-n attributes. This attribute specifies an icon to represent the entire MIDlet suite. • MIDlet-Info-URL: If additional information about the MIDlet suite is available online, use this attribute to list the URL.
You’ll notice details about the development environment most in this chapter, where we’ll go into detail about the build tools and the emulators. For much of the remainder of this book, we’ll be describing the MIDP APIs, so it won’t really matter which development kit you use. Debugging Your MIDlets If you are using any of the previously listed IDEs, you will have an integrated full-featured debugger for stepping through and debugging your MIDlets. println() call to output to console. The WTK maintains a console that will show all your debug and stack traces.